Sword Art Online and Girls und Panzer. That would go pretty dark, pretty quick.
I also thought about SAO and The Gamer, but the latter is already almost an inversion of the former -- where the real world begins to behave by game-world rules.
I also thought about SAO and The Gamer, but the latter is already almost an inversion of the former -- where the real world begins to behave by game-world rules.